I wouldn't feel okay spending that much on a headpiece, but if it's something really important to you I'd go for it. I really love the first one better though, but def look around for a cheaper alternative. Etsy is a great place to look!
I ran into a similar problem. I wanted a halo in a certain style but couldnt find one that was LONG enough and pretty enough and less than $50.
So, I made my own, and honestly, it was the easiest DIY I've done. My HMUA was really worried and kept telling me not to do it but when I finally just said look Im going to try to make it and if it doesn't work, just tell me right off at my hair trial and I will just spend the extra money it. Turns out she was super impressed. Like couldn't stop raving about it seems she has messaged me telling me she's told other brides how I did it too.
I just bought a wedding belt with the design I liked, flexy wire combs and small gauge wire off Amazon, plus some glue from Walmart. I cut the loop ends and ribbon off the belt, applied a thin layer of glue on the combs, pressed the headband to it, then wrapped it with wire and let it dry.
I spent under $30 & less than 1 hr to make. It did have to dry for 48hrs though until it was completely cured.
Have you checked Amazon? I got mine on there for $15. They were much cheaper on amazon than on Etsy and there are so many options. Personally, I don't think $300 is worth it but if you really love it, go for it!